SSH keys

  • To generate new ssh keys
    • ssh-keygen -t ed25519 -C “email@address.tld ”
    • creates keypair in ~/.ssh/{id_ed25519.pub,id_ed25519}
      • The .pub file is the public key

SSHD

  • Install sshd with
       - sudo apt install openssh-server

  • Modify configuration of /etc/ssh/sshd_config and
       - Add AllowUsers sagar at the end
       - Set PermitRootLogin No

  • Restart
       - sudo systemctl restart sshd
       - sudo systemctl restart sshd

  • Typically, also remember to fail2ban

  • Make sure that UFW is configured .